Hide AC row in rewards summary when AC is disabled

[zenparsing]

Resolves brave/brave-browser#18651

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally: npm run test -- brave_browser_tests, npm run test -- brave_unit_tests, npm run lint, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

Scenario: User with AC disabled

• Given that the user has disabled AC
• When the user opens the rewards panel and views the summary
• Or the user opens brave://rewards
• Then the "Auto Contribute" row in the rewards summary should not be displayed.

Scenario: User in a bF region

• Given that the user's profile is associated with a bF region (i.e. Japan)
• When the user opens the rewards panel and views the summary
• Or the user opens brave://rewards
• Then the "Auto Contribute" row in the rewards summary should not be displayed.

[emerick]

LGTM

[LaurenWags]

Verified using

Brave | 1.32.65 Chromium: 95.0.4638.40 (Official Build) nightly (x86_64)
-- | --
Revision | e3e7c76ba0284b16087cf4cf3153abfaef6470c7-refs/branch-heads/4638@{#624}
OS | macOS Version 10.15.7 (Build 19H1417)

Verified the test plan from #10428 (comment).

Confirmed when in US region with AC off, the Auto Contribute line does not show in the wallet summary from the panel or on brave://rewards page. Confirmed for both clean and upgrade profiles. Also confirmed when AC is on for US region it does show in the wallet summary.

Example	Example

Confirmed when in Japan region, the Auto Contribute line does not show in the wallet summary from the panel or on brave://rewards page. Confirmed for both clean and upgrade profiles.

Example	Example